Gas-heater



J. .BIRKEY.

Gas Heater.

Patented Oct. 31, 1865.

W/ r/vg-sse'ss UNITED STATES PATENT OFFICE.

JOHN Q. BIRKEY, OF PHILADELPHIA, PENNSYLVANIA.

GAS-H EATER.

Specification forming part of Letters Patent No. 50,678, dated October 31, 1865.

accompanying drawings, and to the letters of reference marked thereon.

My invention consists of certain apparatus,

fully described hereinafter, for obtaining from ordinary illuminatinggas either a didused or concentrated heat, the said apparatus having been designed with the view of thoroughly mixing atmospheric air with the gas, of consuming the carbon, and of obtaining a flame of intense heat, so that it may be used for culinary and a variety of other purposes.

In order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanying drawings, which form a part of this specification, Figure 1 is a vertical section of my apparatus for generating heat from illuminating-gas; Fig. 2, a plan "iew.

A is a cast-iron casing, which, in the present instance, is square and tapering from the base upward. The form of this casing, however, may be modified without departing from the main feature of my invention. In the top of this casing is let the upper flanged edge of a tube, B, which isof the form of a truncated cone inverted, and which terminates at the lower end in the flaring mouth a. This tube B is confined to its place by an annular plate, D, through lugs on which pass set-screws 1) into the casing, and this annular plate contains a disk, P, of wire-gauze or thin perforated metal.

F is an ordinary gas-pipe passing through and secured to the casing A, and terminating in an ordinary tip, G, which is central with, but situated below, the flaring mouth a of the tube B.

On the top of the casing A are four projections, 0, on which rest culinary vessels or other objects to be heated, and on the plate D is an annular projection, f, on which is cut a screwthread adapted to an internal thread at the lower edge of the cone-shaped tube H, which can be readily removed and replaced at pleasure.

Many plans have been devised for the purpose of rendering illuminating-gas available as a generator of heat, a thorough admixture of a plentiful supply of atmospheric air with the gas prior to both passing through a piece of wire-gauze or a perforated plate, and the consumption of carbon being the object aimed at, but never perfectly attained.

After many very careful experiments with apparatus of difi'erent construction I have ascertained that the desired admixture of the air and gas and the most thorough combustion of the carbon can be eli'ected, and a flame of the most intense heat produced by the apparatus described above, in which two main features. tend to produce the desired effect: First, it is essential that the gas and air should be directed to the perforated plate E through a tube, B, of the form of a truncated cone inverted second, it is essential that the open.- ing in the tip G for the exit of the gas should be central with and below the mouth of the tube B. Experiments have convinced me that the best results depend upon the position of the tip below the mouth of the tube B.

When the apparatus is required for heating culinary vessels or other objects the tube H is removed and the objects to be heated placed upon the projections e so as to be a proper distance above the flame which is ditl'used over the upper surface of the perforated plate E. When a concentrated flame is required the tube H is adjusted toits proper position above the perforated plate, when a flame of intense heat, equivalent to that caused by a blow-pipe, will issue through the top of the tube.

.It will be evident without further description that the apparatus is applicable to a number of purposes, either when difl'used or concentrated heat is desired.

It will also be evident that the exterior casing, A, may be modified in form without departing from the main feature of the invention.

I therefore claim and desire to secure by Letters Patent 1. The combination of the hollow inverted In testimonywhereof Ihave signed my name truncated cone B, the wire gauze or perfoto this specification in the presence of two subrated plate 1?, and a suitable tip G, the whole scribing Witnesses. being arranged substantially as and for the JOHN Q. BIRKEY. purpose herein set forth. Witnesses:

2. In combination with the above, the con- JOHN WHITE, centrating-tube H,f0r the purpose specified. W. J. R. DELANEY. \b 

